function dumpParticipants(Graph $g) { $nids = $g->getNodeIds(); $parts = array(); foreach ($nids as $id) { $p = $g->getParticipants(array($id)); asort($p); $key = join(',', $p); $parts[$key] = "Participating group: {$key}"; } echo "\n" . join("\n", $parts); // All $p = $g->getParticipants(); asort($p); $key = join(',', $p); echo "\nParticipants ALL : {$key}"; }